theBranicAc
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Can anyone help me solve this vector question?
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The question it asks is ' Show that AMD is a straight line'
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SalazarSlytherin
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An angle/vertex and two mid points arent a straight line. What does the question actually say
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TheConfusedMedic
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this is my working (haven't checked it so there may be mistakes)
If you can't read anything just tell me aha I'm not used to using a laptop to draw

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theBranicAc
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(Original post by SalazarSlytherin)
An angle/vertex and two mid points arent a straight line. What does the question actually say
that is what the question says
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theBranicAc
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(Original post by surina16)
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this is my working (haven't checked it so there may be mistakes)
If you can't read anything just tell me aha I'm not used to using a laptop to draw

theBranicAc
im sorry but I can't understand it
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TheConfusedMedic
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(Original post by theBranicAc)
im sorry but I can't understand it
which parts? all of it?
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theBranicAc
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(Original post by surina16)
which parts? all of it?
all of it
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theBranicAc
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how did you get AM equals -a
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TheConfusedMedic
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(Original post by theBranicAc)
how did you get AM equals -a
AM = AE + EM

AE = -2a - 3b
EM = 1/2 of -EB (negative because you're going in the opposite direction
EM = 1/2 -(-a - 3b) = 1/2(a+3b)

AM = -2a -3b + 1/2a + 3/2b
AM = -1.5a - 1.5b
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Big Moisty
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(Original post by theBranicAc)
Can anyone help me solve this vector question?
Attachment 530435530437



Name:  IMG_4923[1].jpg
Views: 772
Size:  381.5 KB

The question it asks is ' Show that AMD is a straight line'
Show AMD is a straight line by showing they're multiples of each other
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lololololol239
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-BE = -a -3b



--ME = 1/2 (-a-3b)



--AM = -3b -2a + 1/2 (a + 3b)

AM = -3b -2a + 1/2a + 3/2b

AM = -3/2b -3/2a

AM = -3/2 (b + a)



--AD = -2a -2b

AD = -2(a + b) Therefore, A, M, D are on a straight line because they have the same multiply.

I Hope This Helped. Just follow the signs. If you go the opposite way to the direction of the arrow then it is negative. You need to write a sentence using the keywords 'same multiply'. And make sure to factorise for example I did -3/2b -3/2a would be -3/2 (b + a), because -3/2 is common. We know that it is a parallelogram so the sides will e equal. I got 3b because CD + DE is the same as 2b + b which adds up to 3b. If you don't understand, try maths genie or watch a video on youtube. I wish you the best of luck.
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lololololol239
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(Original post by lololololol239)
that is wrong.
--BE = -a -3b

--ME = 1/2 (-a-3b)

--AM = -3b -2a + 1/2 (a + 3b)
AM = -3b -2a + 1/2a + 3/2b
AM = -3/2b -3/2a
AM = -3/2 (b + a)

--AD = -2a -2b
AD = -2(a + b) Therefore, A,M, D are on a straight line because they have the same multiply.
I Hope This Helped. Just follow the signs. If you go the opposite way to the direction of the arrow then it is a negative. You need to write a sentence using the key words 'same multiply'. And make sure to factorise for example i did -3/2b -3/2a would be -3/2 (b + a), because -3/2 is common. We know that it is a parallelogram so the sides will e equal. I got 3b because CD + DE is the same as 2b + b which is adds up to 3b. If you don't understand, try maths genie or watch a video on youtube. I wish you the best of luck.
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